Version 4
SHEET 1 880 680
WIRE -160 -80 -224 -80
WIRE -96 -80 -160 -80
WIRE 112 -80 -16 -80
WIRE 176 -80 112 -80
WIRE 304 -80 256 -80
WIRE -224 -64 -224 -80
WIRE -224 32 -224 16
WIRE 112 80 112 -80
WIRE 176 80 112 80
WIRE 304 96 304 -80
WIRE 304 96 240 96
WIRE 416 96 304 96
WIRE -160 112 -224 112
WIRE -96 112 -160 112
WIRE 112 112 -16 112
WIRE 176 112 112 112
WIRE -224 128 -224 112
WIRE -224 224 -224 208
WIRE -160 272 -224 272
WIRE -96 272 -160 272
WIRE 112 272 112 112
WIRE 112 272 -16 272
WIRE -224 288 -224 272
WIRE -224 384 -224 368
FLAG -224 32 0
FLAG -224 224 0
FLAG -224 384 0
FLAG 416 96 U
FLAG -160 -80 U2
FLAG -160 112 U1
FLAG -160 272 U3
DATAFLAG 368 96 "round($*10k)/10k"
DATAFLAG 80 112 "round($*10k)/10k"
DATAFLAG 80 -80 "round($*10k)/10k"
SYMBOL Opamps\\opamp 208 32 R0
SYMATTR InstName U1
SYMATTR SpiceLine Aol=1000K
SYMBOL Misc\\EuropeanResistor 272 -96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 0 -96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 0 96 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 0 256 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL voltage -224 -80 R0
SYMATTR InstName V2
SYMATTR Value 2
SYMBOL voltage -224 112 R0
SYMATTR InstName V1
SYMATTR Value 1
SYMBOL voltage -224 272 R0
SYMATTR InstName V3
SYMATTR Value 3
TEXT -224 -184 Left 2 !.op
TEXT -224 -224 Left 2 !.lib opamp.sub
TEXT 48 -208 Left 3 ;U = U3 +U1 -U2